The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 20, 2006
Filed:
Nov. 20, 2003
James C. Chen, Tucson, AZ (US);
Olympia Gluck, Haifa, IL;
Gabriel G. Walder, K. Haim, IL;
Yelena Zilberstein, Haifa, IL;
Warren K. Stanley, Tucson, AZ (US);
Edward H. Lin, Tucson, AZ (US);
James C. Chen, Tucson, AZ (US);
Olympia Gluck, Haifa, IL;
Gabriel G. Walder, K. Haim, IL;
Yelena Zilberstein, Haifa, IL;
Warren K. Stanley, Tucson, AZ (US);
Edward H. Lin, Tucson, AZ (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
Methods, system and computer program product are provided to improve the efficiency of data transfers in a PPRC environment. A block of data to be transferred is divided into tracks. Each track is allocated to a data mover task control block (TCB) with a master TCB being assigned to supervise the data mover TCBs. The tracks are then transferred from the primary storage controller to the secondary controller in a piped fashion over a link coupling the primary and secondary storage controllers. However, the usage of resources is monitored by a resource management algorithm and, if too many TCBs are being used for a transfer or if the supply of data mover TCBs is exhausted, the transfer is automatically switched to a serial, non-piped transfer with the master TCB serving as the data mover TCB for the remaining tracks. In addition, the various links coupling the primary and secondary storage controllers is monitored to determine which link will provide the fastest transfer. If, during a transfer of tracks over one link, a faster link is identified, the transfer may be switched to the second, faster link.